V.
ELECTRICAL CONTROLS AND WIRING
NOTE:
There may be more than 1 electrical supply to unit.
Refer to Fig. 6 for field application wiring and Fig. 7 for unit
wiring. With power disconnected to unit, check all electrical
connections for tightness. Tighten all screws on electrical connec-
tions. If any smokey or burned connections are found, disassemble
connection, clean all parts, strip wire, and reassemble properly and
securely.
Reconnect electrical power to the unit and observe unit through 1
complete operating cycle. Electrical controls are difficult to check
without proper instrumentation. A good voltmeter is needed to
check for correct operation of controls and wiring.
Fig. 4—Position of Pilot to Hot Surface Ignitor and Flame
Sensing Rod
A96077
FLAME
SENSING
ROD
HOT
SURFACE
IGNITOR
3
⁄
8
″
TO
1
⁄
2
″
Fig. 5—Pilot and Burner Flames
A84076
BURNER FLAME
PILOT FLAME
BURNER
MANIFOLD
Fig. 6—Heating and Cooling Application Wiring Diagram
A96104
1. Connect Y-terminal as shown for proper cooling operation.
2. If any of the original wire, as supplied, must be replaced,
use same type or equivalent wire.
3. Proper polarity must be maintained for 115-volt wiring.
4. Some thermostats require a "C" terminal connection as shown.
NOTE :
115-VOLT
FIELD-SUPPLIED
FUSED DISCONNECT
24-VOLT
TERMINAL
BLOCK
THREE-WIRE
HEATING
ONLY
FIVE
WIRE
NOTE 4
THERMOSTAT
TERMINALS
FIELD-SUPPLIED
FUSED DISCONNECT
CONDENSING
UNIT
TWO
WIRE
R
G
C
W
R
C
G
Y
GND
GND
FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-, 208/230-, 460-VOLT WIRING
208/230- OR
460-VOLT
THREE
PHASE
208/230-
VOLT
SINGLE
PHASE
W
Y
GND
GND
GND
115-VOLT
SINGLE
PHASE
GND
—4—
